Office for Nuclear Regulation

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Hinkley Point B Planned Intervention

Executive summary

Purpose of intervention

This was a planned inspection of EDF Energy Nuclear Generation Ltd’s (NGL’s) Hinkley Point B power station, undertaken as part of the planned intervention strategy for the Civil Nuclear Reactor Programme (CNRP) of the Office for Nuclear Regulation (ONR).

The work was carried out in line with the planned inspection programme contained in the Hinkley Point B Integrated Intervention Strategy (IIS).

Interventions Carried Out by ONR

I (the nominated site inspector for Hinkley Point B) carried out a compliance inspection on LC11 (emergency arrangements), met with the site internal regulator, reviewed the ONR issues database and held a number of information exchange meetings with station staff.

The intervention was performed in line with ONR’s guidance requirements (as described in our technical inspection guides) in the areas inspected.

Explanation of Judgement if Safety System Not Judged to be Adequate

Not applicable - no system based inspections were carried out during this visit.

Key Findings, Inspector's Opinions and Reasons for Judgements Made

I carried out a compliance inspection of LC11 (emergency arrangements), reviewed the performance of the emergency arrangements over the past year and considered the scenario being developed for next year’s annual demonstration exercise.  I was satisfied that adequate emergency arrangements were in place and that progress was being made towards the next emergency exercise demonstration.  I therefore awarded an IIS rating of – 3 (adequate) to this inspection.

I reviewed the ONR Issues database and the progress that was being made to address the issues.  I will review the database routinely every three months.

I met with the site internal regulator (Independent Nuclear Assurance – INA) to discuss recent incidents, on-going inspections and future intervention topics.  During the discussions a number of opportunities to enhance communications between ONR and INA were noted and these will be implemented in due course.  I also held information exchange meetings with station staff on a range of topics including the introduction of a flexible permissioning process, refilling of a gas turbine fuel oil tank, learning opportunities from a recent event with gas circulators at Hunterston B, two recent incidents on the site (removal of the Interim Package Boilers and radiography), progress with outage preparations, general plant status and commissioning of the new Nitrogen injection system.

Conclusion of Intervention

For LC11 (emergency arrangements), I was satisfied that processes were in place to demonstrate adequate compliance with the licence condition.

 I was satisfied with progress to address issues on the ONR database and with the developments on a number of projects on the site.

There are no findings from this inspection that could significantly undermine nuclear safety.